Animal Welfare Inconsistencies?

Animal welfare activists seem prone to certain inconsistencies. Then again, my perception of inconsistency may merely be a reflection of a lack of understanding of the subject.

Some of the more extreme elements of the movement decry the harm done to animals by humans – even to the point of being against hunting, yet they say nothing of how some of those same animals that they protect hunt and harm other animals.

Male dolphins practice killing porpoises before they kill the young of rival males. Cats toy with rodents before finally killing them. Squid are sloppy and wasteful; they take bites out of several fish, never finishing any of them, and leaving them all to die. Wasps paralyze spiders with a sting before laying their eggs in the still-living body of the spider. Certain parasitic worms screw with the development of tadpoles, giving the resulting frogs extra legs, making them slow and vulnerable to birds – just so the parasite can enter the next phase of its life cycle in the gut of the bird! Despite all our flaws, humans are among the most humane and efficient of killers.

To me, this seems like unfair discrimination based solely on the race of the hunter. Am I wrong?